Elisiia emerson



W: rNrEsrs:

No. 614,245. Patented Nov. 15, 1898. E. EMERSON.

MOLO FOR MAKING CLICO PRINTERS' ROLLS.

\ Applica.tion filed Jan. 19` 1897.2

UNITED `STATES PATUENT OFFICE.

ELISHA EMERSON, OF BUFFALO, NEW' YORK.

MOLDv FOR MAKING CALlCO-PRINTERSJ ROLLS.

SPECIFICATION forming part of Letters Patent No. 614,245, dated November15, 1898.

' Application filed January 19, 1897. erial No. 619.784. (No model.)

T0 all witam it may concern:

New York, have invented certain new and useful Improvements in Molds forMaking Calico-Printers, Rolls; and I hereby declare that the followingis a full, clear, and exact description of the same, reference being hadto the accompanying drawings, forming part of this specification.

This invention has reference to an improved mold for makingcalico-printers rolls.

Calico-printers, rolls consist of copper cylinders having thick walls.Such rolls are heavy, and as they must be made of the best quality ofcopper lare correspondingly costly. Rolls of this kind are usuallyengraved with the desired pattern, and after being used for a season areturned down and a new pattern is engraved on the cylindrical surface ofthe rolls.

Calico-prnters use a large number of standard patterns, and the rollscontaining such patterns are either never turned down to have otherpatterns engraved on them or are usedV for a long succession of yearsbefore the pattern is turned down and another standard pattern engravedthereon. In a calico-printing establishment the capital invested inthese standard rolls is very large, owin g to the great aggregate weightof the refined pure copper contained in the rolls. capital and the costof insurance form a large item of the running expenses of such works.Calico-printers7 rolls, consisting of a copper cylinder strengthened bytin or other metal, have been made by casting the hacking into thecopper cylinder or between a central mandrel and the interior of thecylinder. Printers, rolls have also been made by drawing the coppercylinder over an iron core; but calicoprinters, rolls so made were notpractically useful, because the' great pressure exerted on the coppercylinder separated the cylinder from the core Vor hacking, and theserolls failed, after a short time of use, to register with the series ofrolls used to print the different colors of a pattern.

This invention has reference to an improved mold for makingcalico-printers, rolls and in The interest on this' i the constructionthereof, as will be more fully Be it known that I,,ELIsHA EMERsoN, ofBuffalo, in the county of Erie and State of described hereinafter.

Figure 1 is a longitudinal sectional view showing a composite roll in amold in which the backin g has been cast into a copper tube. Fig. 2 is aside view of the vcore of the mold by which the mandrel-hole is formedwith the usual spline for securing the roll to the mandrel whenthe roll'is used. Fig. 3 is a top view of the mold; Fig. 4:, a transversesection, on an enlarged scale, near the ends of the mandrel-core. Fig. 5is an enlarged section of the mandrel-'core at any point between theends shown in Fig. 2. Fig. 6 is a transverse section of the 'improvedcomposite calicoprinters, roll.

Similar letters of reference designate corresponding parts in all thefigures.

In the drawings, a indicates a seamless cylindrical tube of the purecopper of which calico-printing rollers are usually made; b, the bottomplate of the mold, provided with -an annular groove to receive one endof the Sare screw-threaded. A cross-bar Z', having a central holethrough which the rod d passes, extends across the slotted end or lug lof each of the arms i. The nuts r r on the screwthreaded ends of therods d are screwed down onto the cross-bar Z' and draw the upper and rooI will now more fully describe the preferred method of producin g thecomposite roll, viz: The tube a of copper has the endsfinished so as totightly fit and make a close joint in the annular groove of the plate Z)and the rim h of the spider g. The interior surface is thoroughlycleaned with acid, so as to remove all 'oXidation, and this innersurface may now be tinned or covered with a fiux. The tube a is nowsecured firmly between the plate b and the spider g. The core f isinserted and the melted metal spelter or composition of metals-such asbrass, bronze, or Babbitt metal-is poured into the space between thetube a and the core for the mandrel f, and when sufficiently cooled thecomposite roll is removed from the mold, the screws q q are removed fromthe mandrel-core f, the dovetail strip 0 is forced inward to permit theparts m and n to be Withdrawn, and the ends are then turned oif true ina lathe. The roll so produced accurately fits the ordinary mandrel andmay be used in the same manner as a solid copper roll. The thickness `ofthe copper tube a is suflicient to receive successively one, two, or, ifdesired, more engraved patterns, while the cost of these rolls is muchless than the solid copper rolls as heretofore made.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In a mold for producing composite calcoprinters,rolls, the combination with the bottom plate b having an annular groovefor the reception of the end of the cylinder a, a central opening forthe mandrel-core f and the lugs c, c, of the spider g having the annularrim h, the arms i, i, the central perforated boss 70 and the lugs Z, themandrel-core f supported at opposite ends in the center of the tube a,and the rods d, d, screw-threaded, as described, and provided with nuts,Whereby the parts of the mold are secu red together, as described.

2. The combination with a mold for casting inferiormetalintoacoppertubeto form calicoprinters, rolls, of a mandrel-core consisting of theSections 'm and n, the dovetail strip o provided with the groove v, therings p, p, and screws q, q, whereby the mandrel may be withdrawn fromthe tube, as described.

In witness whereof I have hereunto set my hand.

ELISI'IA EMERSON.

Vitnesses:

JosEPH A. MILLER, J osEPH A. MILLER, Jr.

